Time-lock



M. c. HAWKINS.

TIME oon. No. 296.561. Patented Apr. 8, 1884."

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M ATTURNBYS;

N. PiTEfli Plmmuzna nuher. Wahinginn. u c.

MOSES CHAMPEN HAXVKINS, OF

TIME- ATEN'r EDINBOROUGH, PENNSYLVANIA,

LOCK.

SPECIFICATION forming part of Letters Patent No. 296,561, dated April 8,1884.

Application filed Jnly'ZS. 1883. (ModeL) To caZZ whom it may concern."

Be it known that I, Mosns Gnnnrnn HAW- KINS, of Edinborough, in thecounty of Erie and State of Pennsylvania, have invented a new andImproved TimeLock, of which the following is a full, clear, and exactdescription.

Figure 1 is a side elevation of myimproved time-lock. Fig.2 is an endelevation. Fig. 3 shows the center arbor and pinion, and Figs. d and 5are respectively views of the center pinion and carrying-nut.

The object of this invention is to insure the release of the lock-boltat the prescribed moment, and also to release the bolt in case ofbreakage of the spring of the time-movement.

The invention consists, mainly, in what I call an accident'lever,provided with two pawls, one engaging a ratchet on the goingbarrehandthe other engaging a stationary ratchet, the said lever being providedwith an inclined surface for engaging the time-catch when theaccident-lever is thrown forward by the recoil of the going'barrel onthe breaking of a spring.

In the drawings, in which the same letters of reference indicate thesame parts in the different figures, A is the tumbler of an ordinarycombination-lock; B, the sliding bolt, having the usual projection, a,for entering the notch oi the tumbler; and O is a latch turning on thepivot 12, and capable of engaging the pin a, projecting from the side ofthe bolt B. The latch G is provided with theshort downwardly-projectingbeveled arm cl, and at the extremity of its free end there is a roller,e, on a pin projecting horizontally from the face of the latch. Thetime-movement 1) is provided with a pin-wheel, 1*], driven by a in theusual way.

Upon the arbor F is loosely placed a sleeve, 71, between theratchet-wheel i and the collar 1 j. The center wheel, is, is fixed tothe end of the sleeve, and carries a spring-acted pawl, Z, which engagesthe ratchet-wheel On the sleeve it is loosely placed the center pinion,m, the said pinion being provided with a lug, n, which is engaged by asimilar lug, 0, on the nut 12. The wheel G on the goingbarrel H engagesthe pinion m, and also carries a ratchet-wheel, g, which is engaged by aspring-acted pawl, 2', carried by the arm I, which is fixed to a shaft,3, journaled in the frame of the time-movement D, and carrying upon itsinner end the accident-lever K, the upper end of which is inclinedtoward the pivot b of the latch O, and terminates in a hook, s. Afixedarm, L, having on its ,11131361 edge a series of ratchet-teeth, projectsfrom one side of the time-movement frame in position to engage thespring-acted hooked pawl 2, carried by the arm K on the side oppositethe pawl 1'. 1

In the normal working of the lock, the on of the arm (1, projecting fromthe latch. C, raises the said latch above the pin 0 at the prescribedtime, so that the lock' may be our locked in the usual manner. In casethe spring breaks I employ the recoil of the spring to raise the latch Cand liberate the bolt.

I have found by experience and investiga tion that in the great majorityof cases the breakage of springs occurs in the inner coils. This beingthe case, the force of the recoil comes mainly on the going barrel. There verse motion of the going-barrel caused by the recoil of the springcarries forward the pawl r and the lever I, also the accident-lever K,when the inclined surface of the said accidentlever strikes the roller 0on the latch G and raises the latch. At the same time the hooked pawl tengages the ratchetteeth of the arm L,

in a released position, so that the combinationany one having thecombination. Any effect of the recoil of the spring on the gearing ofthe time-movement is prevented by the free rotation of the pinion m onits sleeve in the reverse direction for the greater portion of arevolution, and the subsequent unscrewing of the nut p when the lug nofthe pinion m strikes the lug o of the nut p. The free retrogagement ofthe pin 5/ with the inclined face and retains the accident-lever and thelatch (l lock can at any time thereafter be opened by 7 grade revolutionof the pinion m for the greater patent that may be granted upon thisappli- :25-

portion of a revolution permits the mostv of the force of the recoil tobe exerted 011 the aecident-lever, insuring its quick and certain actionon the latch O.

The center arbor, F, is driven by the e11- gagement of the pawl Zon thewheel 7- with the ratchet-wheel t, fixed on the arbor. This arrangementadmits of turning the arbor forward at any time for the purpose ofadjustment; Y

I do not limit my invention to the precise form shown in the drawings,as it may be modified without departing from the spirit of my invention.For example, the pin g in the Wheel. E may be made adjustable in acircular slot in the wheel, instead of being placed in the differentholes, and the pawls r I may be placed directly on the accident-leverinstead of the arm I.

I do not abandon or dedicate to the public any patentable feature setforth herein and not hereinafter claimed, but reserve the right .toclaim the same either in a reissue of any cation or in any otherapplications for Letters Patent I may make.

Having thus described my invention, I claim as new and desire to secureby Letters l?atent l. The combination, with the slide-bolt B, having aside pin, 0, of the latch O, engaging said pin, turning on a pivot, b,and having a downu 'ardlyprojecting beveled arm, (I, and a roller, 0,ona pin projecting horizontally from the face of the latch, atime-movement having the pin-wheel E, the gear f F, and the pin 9,wherebythe latch may be raised and the bolt released at any desiredtime, as described.

2. Thecombination, with the going-barrel and time-catch of anaccident-lever, two springpawls on arms I K, a ratchet on thegoing-barrel, and a stationary ratchet, said lever having an inclinedsurface to engage with said time-catch, as and for the purposespecified,

MOSES GHAMPEi HAWKINS. Vitnesses:

ALONZO PERRY, RUFUs E. HAWKINS.

